Cung và góc lượng giác. Công thức lượng giác

$$135\degree$$  

$$72\degree$$  

$$270\degree$$  

$$240\degree$$  

$$\frac{7}{2}\pi$$  

$$\frac{7}{4}\pi$$  

$$\frac{2}{7}\pi$$  

$$\frac{4}{7}\pi$$  

$$60\degree$$  

$$-60\degree$$  

$$60\degree+k180\degree$$  

$$-60\degree+k360\degree$$  

$$1020\degree$$  

$$-1020\degree$$  

$$1080\degree$$  

$$-1140\degree$$  

$$\frac{k}{2}\pi$$  

$$\frac{\pi}{2}+k\pi$$  

$$\frac{\pi}{2}+k2\pi$$  

$$\pi+k2\pi$$  

$$60\degree$$  

$$-60\degree$$  

$$60\degree+k180\degree$$  

$$-60\degree+k360\degree$$  

Đúng

Sai

$$\sin\left(-x\right)=-\sin x$$  

$$\cos\left(-x\right)=-\cos x$$  

$$\tan\left(-x\right)=\tan x$$  

$$\cot\left(-x\right)=\cot x$$  

$$x$$  

$$-x$$  

$$\frac{\pi}{2}-x$$  

$$\pi-x$$  

$$\sin x$$  

$$\cos x$$  

$$\tan x$$  

$$\cot x$$